import java.util.Scanner;
class sanyuan {
 // main方法
  public static void main(String[] args){
    // 输出语句
    // System.out.println("Hello Java!");
    Scanner s = new Scanner(System.in);
    System.out.println("in");
    int score = s.nextInt();




    if(score == 100){
      System.out.println("carBNW");
    }else if(score > 80 && score <= 99){
      System.out.println("iphone5");
    }else if(score > 60 score <= 80){
      System.out.println("book");
    }else{
      System.out.println("nothing");
    }



  }
}
